我有一张有几列的垫子表。对于一种情况,我需要隐藏两列。对于普通表,我们将使用简单的 ngIf 条件。但是对于这个似乎不起作用的垫子表。我试过这个,
displayedColumns1: any[] = [
'Ref No', 'E Type',
{ def: 'Approve', showMobile: true },
{ def: 'Transfer', showMobile: false },
];
getDisplayedColumns(): string[] {
const isMobile = this.entityRole === 'Admin';
return this.displayedColumns1
.filter(cd => !isMobile || cd.showMobile)
.map(cd => cd.def);
}
我的 HTML:
<table mat-table [dataSource]="dataSource" class="">
<tbody>
<ng-container matColumnDef="Ref No">
<th mat-header-cell *matHeaderCellDef> Ref No <br>
</th>
<td mat-cell *matCellDef="let element"> {{ ref }} </td>
</ng-container>
<ng-container matColumnDef="E Type">
<th mat-header-cell *matHeaderCellDef> E Type <br>
</th>
<td mat-cell *matCellDef="let element"> {{ etype }} </td>
</ng-container>
<ng-container matColumnDef="Approve">
<th mat-header-cell *matHeaderCellDef> Approve <br>
</th>
<td mat-cell *matCellDef="let element"> {{ Approve}} </td>
</ng-container>
<ng-container matColumnDef="Transfer">
<th mat-header-cell *matHeaderCellDef> Transfer <br>
</th>
<td mat-cell *matCellDef="let element"> {{ Transfer }} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="getDisplayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: getDisplayedColumns;">
</tr>
</tbody>
</table>
但它给出了 ERROR TypeError: Cannot read property 'diff' of undefined error。有人可以建议我如何在 mat-table 中做到这一点吗?